Warp tensioning device



May 3, 1949. N. s. JOHNSON ETAL 2,468,880

WARP TENSIONING DEVICE Filed May 24, 1948 3 Sheets-Sheet INVENTORS NELLIE $.JOHNSON y- ALB'ERT F. SARGENT ATTORNEYS May 3, 1949. N. s. JOHNSON ET AL WARP TENSIONING DEVICE Filed May 24, 1948 s Sheets-Sheet 2 INVENTORS NELLIE S.JO-HNSON 1 y ALBERT F. SARGENT ATTO RN EYS May 3, 1949. N. s. JOHNSON ET AL 2,

WARP TENSIONING DEVICE 3 Sheets-Sheet 3 Filed May 24, 1948 INVENTORS N ELLIE $.JOHNSON BY ALBERT F.SARGENT ATTORNEYS Patented May 3, 1949 UNITED STATES PATENT OFFICE Nellie S. Johnson and Albert F. Sargent,v Detroit, Mich.; said Sargent assignor to said Johnson Application May '24, 1948, Serial No. 28,784

4 Claims.

The invention relates to warp tensioning devices and refers more particularly to .devices for atensioning the warp threads being wound upon the warpbeam of a loom.

The invention has for one of its objects to provide an improved warp tensioning device which is so constructed that it may be readily mounted on and secured to a loom in proper position relative toits warp beam.

The invention has for another object to provide an improved warp tensioning device comprising a frame, a guide for the warp threads and tensioning means, the parts of which are de- 'tachable so that theyv may be readily nested in compact relation for shipment.

' The invention has for a further object to provide an improved arrangement of guide elements and tensioning rods for the warp threads carried by the frame and so arranged that while the warp threads are being pulled through the guide elements and around the tensioning rods, at the same time being wound upon the warp beam of the loom, these warp threads will be properly "tensioned' and also properly positioned with respect to each other.

With these as well as other objects in view the invention resides in the novel features of construction, arrangements and combinations of parts as more fully hereinafter set forth:

In the drawings:

Figure 1 is a perspective view showing a loo-m having applied therethrough a warp tensioning device embodying the invention; I v

Figure 2 is an end view partly broken away and partly in section of Figure 1;

Figure 3' is a top plan view of a portion of Figure 1;

Figure 4 is a rear elevation; and 7 Figure 5 is a cross section on the line 5-5 of Figure 3.

In the present instance, the loom is a hand loom of the type illustrated and described in the copending application to Nellie S. Johnson, Serial No. 719,757 filed January 2, 1947. This hand loom in general comprises the main frame I', the rear rail frame 2', thebreast rail frame 3, the harness or heddl'e' frames 4 vertically reciprocable' the main frame, the beater frame 5 carrying the reed frame 6, the Warp beam 7 carri d by the rear rail frame and the cloth beam 8 carried by the breast rail frame.

The rear rail frame is formed of the end bars 9 and the rear rail I 0 extending between and secured to the upper ends of these end bars. The Warp beam is of the sectional type and comprises the cross members II and the longitudinal bars l2 secured to the cross members, these longitudinal bars having secured thereto the transverse pins l3 which arespaced longitudinally of the bars. The warp beam is rotatably mounted on the end bars .9 of the rear rail frame by means of the shaft M extending axially through the warp beam and non-rotatably secured to the cross members H of the warp beam, this shaft being journalled in the end bars 9 and having secured to one end thereof the crank 15 for rotating. the warp beam. To hold the warp beam from accidental rotation in a direction to unwind the warp threads there is the ratchet wheel l6 non-'- rotatably secured to the warp beam and the pawl or dog I! mounted on the adjacent end bar 8 of the rear rail frame.

To facilitate winding of the Warp threads I! on the warp beam 1 the warp tensioning device I9 is provided. This warp tensioning device is constructed so that it may be readily attached to or detached from the rear rail [0 of the rear rail frame in positions above and registering with the spaces between the adjacent pins l3 of the warp beam. In detail, the warp tensioning device comprises the channel-shaped frame 20, the dependingchannel-shaped guide 2| and the tensioning mechanism 22 carried by the frame. The frame has the bottom wall 23 and the side walls 24 and is provided with the opening 25' at one end Which is formed by the strap 28 and the adjacent spaced end of the bottom wall, the strap being opposite the end. This strap is secured to the side walls 24' by suitable means such as screws. The guide 21 is formed of the main wall 21 and the side walls 28, the upper ends of the side walls terminating below the upper end of the main wall which is of a width to fit between the side walls 24 of the frame 20 and also between the strap 26 and the adjacent spaced end of the bottom wall 23 of the frame; 29 is a bar pivotally connected to the main wall 27 of the guide 2| by means of the hinge 30 which permits the bar or board 28 to swing downwardly and lie parallel to the main wall 21. This bar 29 has a length greater than the Width of the rear rail Ill and in the assembled relation of the frame and guide is spaced from the bottom wall 23 of the framea sufficient distance to per mit the warp tensioning device to be moved over the rear rail with the bottom wall 23 and bar 29- respectively above and below the rear rail. For detachably securing the warp tensioning as. vice to the rear rail there is the tension member 3| in the nature of a bolt extending through the bottom wall 23 of the frame and through the free end of the bar 2 9, the bolt having its head at the upper side of the bottom wall 23. There is also the adjustable member 32 in the nature of a thumb nut threadedly engaging the lower end of the bolt and adapted. to be tightened up against the bottom of the bar 23 to thereby frictionally clamp the' warp tensioning device to the rear rail.

The tensioning mechanism 22 carried by the frame also serves to separate the warp threads l8 as they are being pulled through the warp tensioning device and wound upon the warp beam from the spools 33 upon which the warp threads are wound, The spools 33 are mounted on a conventional spool rack. The tensioning mechanism comprises the guide elements 34 detachably mounted in the ends of the frame and the tensioning rods extending between the side walls 24 of the frame and detachably engaging the same. The guide elements as shown are slidable in the slots 36 formed in the side walls 24 and the tensioning rods are cylindrical rods having a sliding fit in cylindrical holes in the side walls 26. Each guide element 34 is formed with the upper and lower rows of holes 3'! and 38 respectively through which the warp threads Pass. The holes 38 are staggered with respect to the holes 31 to laterally space the warp threads as they are pulled through the warp tensioning device.

To facilitate threading of the warp threads through the warp tensioning device, the distance between the side walls of the frame and also the distance between the end openings in both the upper and lower rows is greater than the distance between adjacent pins of the warp beam, and the guide depending from the frame is tapered in width downwardly so that the distance between its side walls at their lower ends is preferably less than the distance between adjacent pins.

In operation, assuming the warp tensioning device I9 to be secured to the rear rail ID of the loom in position so that the lower end of its guide 2| is spaced above the warp beam 1 and registers with the space between adjacent pins i3 and assuming the warp thread spools 33 to be mounted in the spool rack which is spaced from the loom a suitable distance, the warp threads !S from certain spools are passed through the lower holes 38 in the outer guide element 34 upwardly past the nearest tensioning rod 35, downwardly past the next tensioning rod, upwardly past the next tensioning rod, downwardly past the last tensioning rod and finally through the upper holes 3'? of the inner guide element 34. Then the warp threads from certain other of the warp spools are passed through the upper holes 31 of the outer guide element 34 downwardly past the adjacent tensioning rod, upwardly past the next tensioning rod, downwardly past the next tensioning rod, upwardly past the final tensioning rod and then downwardly through the lower holes 38 of the inner guide element 34. It is to be noted that the warp threads extend through holes correspondingly positioned in the guide elements so that they do not cross and as a result they are maintained in substantial parallelism while being pulled through the warp tensioning device, The ends of the warp threads after passing through the holes of the inner guide element pass downwardly in the channel of the depending guide 2| and are fastened by a suitable knot to the cord 4 which is secured to the warp beam. As a result, when the warp beam is turned to wind the cord 40 on the warp beam the warp threads will be pulled through the warp tensioning device and wound on the warp beam and by reason of the tensioning mechanism including the guide elements and the tensioning rods carried by the frame these warp threads will be equally tensicned as well as properly spaced so that they can be wound upon the warp beam in proper manner to later be threaded through the loom.

ill

The warp tensioning device is of simple construction and may be readily mounted on or removed from the loom. Also by reason of the width of its frame and the spacing between the end holes of its guide elements being greater than the distance between adjacent pins of the warp beam threading of the warp threads through the warp tensioning device is facilitated. Furthermore, by reason of the guide, guide elements and tensioning rods being detachably mounted on the frame, these parts may be compactly arranged for shipping.

What we claim is:

1. A device for tensioning warp threads being wound upon a warp beam of a loom, comprising a frame, a guide secured to said frame, means for securing said frame and guide to the rear rail of the loom and positioning said guide with its lower end terminating above the Warp beam of the loom, guide elements for the warp threads mounted on said frame and tensioning members for the warp threads mounted on said frame between said guide elements.

2. A device for tensioning warp threads being wound upon a warp beam of a loom, comprising a frame adapted to be mounted on the rear rail of the loom, guide elements for the warp threads mounted on said frame, tensioning means for the warp threads mounted on said frame between said guide elements and a guide for the warp threads between said frame and the warp beam, said guide being secured to said frame.

3. A device for tensioning warp threads being wound upon a warp beam of a loom, comprising a channel shaped frame, a channel shaped guide detachably secured to an end of said frame, means for detachably securing said frame and guide to the rear rail of the loom and positioning said guide with its lower end above the warp beam of the m, apertured guide elements for the warp threads detachably mounted on and extending across the ends of said frame and tensioning rods for the warp threads detachably extending through the side walls of said frame between said uide elements.

4. A device for tensioning warp threads being wound upon a warp beam of a loom comprising a channel shaped frame, a channel shaped guide having its upper end detachably engagin an opening in an end of said frame, means for detachably securing said frame and guide to the rear rail of the loom, said securing means including a member pivotally connected to said guide, a, tension member extending through the bottom of said frame and said last mentioned member and an adjustable member upon said tension member abutting said pivotal member, guide elements extending across the ends of said frame and detachably mounted thereon, said guide elements having upper and lower rows of holes for the warp threads and tensioning rods for the warp threads detachabl extending through the side walls of said frame and over and under which the warp threads alternately pass.

NELLIE S. JOHNSON. ALBERT F. SARGENI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 882,019 Reed Mar, 17, 1908 

